(under the class definition) Apparatus in which the comminuting surface or surfaces are so arranged or have such characteristics that material of more than a given size is rejected by the surfaces before comminution.
(1) Note. In the devices classified herein, the material which is rejected never reaches the comminuting zone as distinguished from the devices found in this class, subclasses 69+, in which the oversize material is prevented from leaving the comminuting zone after having been treated therein.
(2) Note. Most of the devices classified here are clay grinders which reject the stones mixed in the clay.
SEE OR SEARCH THIS CLASS, SUBCLASS:
83+, for apertured comminuting elements which reject oversize material.
